planting temp chart

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 by Lana Shea

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Soil Temperature for Germination

posted on An Iowa Mom Videos


(If you use a glass soil thermometer, you can start the hole with a screw driver so you don't break the glass.)

Read early morning several days in a row and average the temperatures.


I found lots of variations in temperature planting charts.  I  averaged the results of several charts I found online.  I listed warmer (safer) if conflicting results were close.  These are temperatures if you poke the thermometer in ground about 4-6 inches.


Plant when soil (4"-6" deep) is not less than these temperatures:

45° F : radish, peas, lettuce, spinach, kale, parsnips

50° F: onions, leeks, turnips, chard

60° F: beans, beets, carrots, corn, marigolds

70° F: cucumbers, squash, melons, basil

75° F: pumpkins, okra

If you plant early you may need to do some replanting, however, it also will give a better chance for a longer harvest season.  If seedling emerge during a frost, cover with a sheets or fabric drop cloths (Do not use plastic).

Transplant tomato, eggplant and peppers... Some charts say 60°, 70° & 75°

I plan to plant mine when the air is consistently warm (all danger of frost is gone) and the ground is 70° and cover them with plastic gallon jugs until the plant fills the jug.


http://expresshim.com/plantingtemp.html (feel free to print)